WO2011114789A1 - Electric supercharging device - Google Patents
Electric supercharging device Download PDFInfo
- Publication number
- WO2011114789A1 WO2011114789A1 PCT/JP2011/052103 JP2011052103W WO2011114789A1 WO 2011114789 A1 WO2011114789 A1 WO 2011114789A1 JP 2011052103 W JP2011052103 W JP 2011052103W WO 2011114789 A1 WO2011114789 A1 WO 2011114789A1
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- Prior art keywords
- air
- compressor
- outside air
- electric
- discharge
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
- F02B37/225—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits air passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/005—Cooling of pump drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to an electric supercharger incorporated in an internal combustion engine mounted on an automobile or the like, and enables cooling of an inverter and an electric motor incorporated in the electric supercharger with intake air of the electric supercharger.
- the present invention relates to an electric supercharger capable of suppressing a decrease in compressor capacity and a rise in temperature of discharged air.
- the electric supercharger 102 incorporated in the air supply passage 101 of the engine 100 includes a compressor 104 provided facing the air supply passage 101, an electric motor 106 that drives the compressor 104, and the electric motor 106.
- the supercharging amount adjusting means 110 for instructing the supercharging amount of the electric supercharging device 102 to the control device 108 and an instrument in front of the driver's seat
- the display unit 112 includes a display unit provided on a panel (not shown), and includes a display unit 112 that displays a supercharging amount, and a power source 114 such as an in-vehicle battery or an alternator.
- the control device 108 includes a drive device 116 that drives the electric motor 106 and a control command unit 118 that controls the drive device 116 in accordance with the supercharging amount set by the driver.
- the control device 108 incorporates an inverter composed of switching elements such as FETs, for example, and converts electric power supplied from the power source 114 into alternating current, and arbitrarily changes the voltage and frequency by the inverter.
- the rotational speed of 106 is controlled.
- Patent Document 2 discloses a means for cooling an inverter and an electric motor of an electric supercharger using intake air of a compressor. Hereinafter, the cooling means disclosed in Patent Document 2 will be described with reference to FIG.
- the supply air a is sucked from an intake port of a compressor 202 provided in the supply air flow path 200 and supplied to an engine (not shown).
- the air supply channel 200 is configured by a channel that branches into three from the inlet portion 204. That is, the series flow path 210 passes through the heat generating part of the inverter 206 and the motor 208 and reaches the inlet of the compressor 202.
- the second series flow path 212 bypasses the inverter 206 from the inlet portion 204 and reaches the heat generating portion of the motor 208.
- the bypass passage 214 bypasses the inverter 206 and the motor 208 from the inlet portion 204 and is connected to the air supply passage 216 on the inlet side of the compressor 202.
- a bypass flow path 218 that bypasses the inverter 206, the motor 208, and the compressor 202 from the inlet portion 204 and reaches the inlet side of the engine is provided.
- Movable valves 220, 222, and 224 are provided at the branch portions of the second series channel 212 and the bypass channels 214 and 218.
- the bypass flow path 218 is used when the compressor 202 is stopped, the inlet is normally closed by the movable valve 224.
- the compressor 202 When the compressor 202 is not in operation, the second series channel 212 and the bypass channel 214 are closed by the movable valves 220 and 222 as shown in the figure. At this time, the compressor 202 is idled at a low speed of several thousand to 10,000 rpm, and all the air supply a sucked from the inlet portion 204 is supplied to the series flow path 210. With this air supply a, the heat generating parts of the inverter 206 and the motor 208 are cooled.
- the compressor 202 When the compressor 202 is in operation, the compressor 202 is operated at a high speed of tens of thousands to several ten thousand rpm. For this reason, since the amount of air supply increases, if all the air supply a is supplied to the series flow path 210, a large pressure loss occurs in the supply air flow, so that the three flow paths of the series flow path 210 and the bypass flow paths 214 and 218 are provided.
- the air supply a that is open and provides a flow rate necessary for cooling the inverter 206 and the motor 208 is supplied to the series flow path 210. This prevents a large pressure loss from occurring in the supply airflow.
- the temperature of the intake air of the compressor increases. Along with this, the temperature of the discharge air of the compressor also rises, so that the compressor wheel is overheated, and the strength of the compressor wheel may be reduced.
- the compressor wheel is usually made of aluminum or the like, and may be damaged if a large centrifugal force is applied in a state where the strength is lowered.
- the present invention provides an electric supercharger having a means for cooling an electric motor and an inverter using the air supply of the compressor.
- the purpose is to prevent a decrease in strength and damage by suppressing the decrease and suppressing the overheating of the compressor.
- the electric supercharging device of the present invention includes: A power source such as a power storage device; a compressor provided in an air supply passage of the internal combustion engine; an electric motor that drives the compressor; and an inverter that converts electric power of the power source and supplies the electric power to the electric motor.
- a power source such as a power storage device
- a compressor provided in an air supply passage of the internal combustion engine
- an electric motor that drives the compressor
- an inverter that converts electric power of the power source and supplies the electric power to the electric motor.
- An external air introduction pipe whose air intake opening opens to the outside air and merges with the air supply flow path in the vicinity of the suction port of the compressor, and an air flow rate adjustment mechanism provided in the external air introduction pipe,
- the outside air is introduced from the outside air introduction pipe, and the outside air introduction amount is adjusted by the air flow rate adjusting mechanism to secure the amount of discharge air of the compressor and to suppress the discharge air temperature of the compressor.
- an outside air introduction pipe in addition to the air supply flow path, an outside air introduction pipe is provided in which the air intake port opens to the outside air and introduces the outside air into the compressor. Then, when the amount of air discharged from the compressor is insufficient due to the influence of pressure loss in the air supply flow path, outside air is introduced from the outside air introduction pipe which is not easily affected by pressure loss. As a result, the amount of air discharged from the compressor can be increased, and the compressor capacity shortage and performance deterioration can be prevented. Further, by introducing low temperature outside air directly from the outside air introduction pipe into the compressor, it is possible to suppress the rise in the temperature of the intake air and the discharge air of the compressor and to prevent the strength of the compressor from being lowered.
- a compressor, an electric motor, and an inverter are accommodated, and a sealed housing having an air intake port is provided.
- the supply air drawn from the air intake port passes through the heat generating part of the inverter and the electric motor inside the housing. Then, it is preferable to form an air supply passage leading to the suction port of the compressor and connect the outside air introduction pipe to a housing partition wall near the suction port of the compressor.
- a discharge air flow meter and a discharge air pressure gauge provided in a discharge side air supply flow path of the compressor, a rotation speed detection means of the compressor, the discharge air flow meter, a discharge air pressure gauge, and a rotation speed detection It is preferable to include a controller that inputs a detection value of the means and controls an outside air introduction amount by operating an air flow rate adjusting mechanism of the outside air introduction pipe based on the detection value.
- a pressure gauge for detecting the intake air pressure of the compressor, a controller for inputting a detected value of the pressure gauge, and operating the air flow rate adjusting mechanism based on the detected value to control the outside air introduction amount; It is recommended to have In this configuration, the intake air pressure of the compressor is monitored, and the outside air introduction amount is adjusted according to the intake air pressure. This eliminates the need for installing a sensor in the compressor discharge pipe, and allows the pressure gauge to be incorporated in combination with the air flow rate adjusting mechanism of the outside air introduction pipe, so that the pressure gauge 48 can be easily attached, Since only one sensor is required, the cost is low.
- a discharge air thermometer provided in the discharge side air supply flow path of the compressor and a detection value of the discharge air thermometer are input, and an air flow rate of the outside air introduction pipe is set so that the detection value does not exceed a threshold value.
- a controller for operating the adjustment mechanism to control the amount of outside air introduced is set so that the detection value does not exceed a threshold value.
- the air flow rate adjustment mechanism of the outside air introduction pipe biases the elastic force in the direction of closing the air flow path with respect to the valve body that opens and closes the air flow path of the outside air introduction pipe.
- the pressure adjusting valve may include a spring member that adjusts the air flow rate of the outside air introduction pipe in accordance with the difference between the air pressure of the outside air introduction pipe and the air pressure of the air supply passage.
- the pressure regulating valve automatically opens and can be replenished with outside air from the outside air introduction pipe. Can be suppressed. Further, the controller and the sensors are not necessary, and the pressure regulating valve has only a mechanical configuration, so that the configuration can be simplified and the cost is reduced.
- the outside air introduction pipe and the supply air flow path are connected upstream of the air flow rate adjusting mechanism of the outside air introduction pipe, and an air filter is interposed in the upstream outside air introduction path of this connection portion.
- an air filter is interposed in the upstream outside air introduction path of this connection portion.
- a power source such as a power storage device, a compressor provided in an air supply passage of an internal combustion engine, an electric motor that drives the compressor, and an inverter that converts electric power of the power source and supplies the electric power to the electric motor.
- the air supply passage is disposed so as to pass through the heat generating portion of the electric motor and the inverter on the upstream side of the compressor, and the electric motor and the inverter are cooled by the air supply.
- An outside air introduction pipe that opens to the outside air and merges with the air supply flow path in the vicinity of the suction port of the compressor, and an air flow rate adjusting mechanism provided in the outside air introduction pipe, and introduces outside air from the outside air introduction pipe,
- the amount of outside air introduced by the air flow rate adjustment mechanism to ensure the amount of air discharged from the compressor and to suppress the temperature of air discharged from the compressor,
- the amount of air discharged can be secured to prevent deterioration of the compressor's performance, and low temperature outside air is directly introduced into the compressor from the outside air introduction pipe, so that the rise in the temperature of the compressor discharge air is suppressed and the strength of the compressor is reduced or damaged. Can be prevented.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a diagram which shows the performance map of a compressor. It is front view sectional drawing concerning 2nd Embodiment of this invention apparatus. It is front view sectional drawing concerning 3rd Embodiment of this invention apparatus. It is front view sectional drawing concerning 4th Embodiment of this invention apparatus. It is front view sectional drawing concerning 5th Embodiment of this invention apparatus. It is a block diagram of the conventional electric supercharger. It is a flow-path block diagram which concerns on the air supply flow path of the engine incorporating the conventional electric supercharger.
- FIGS. 1 and 2 show an electric supercharger 10A provided in an air supply passage of an engine (not shown) mounted on an automobile or the like.
- an air supply pipe 14 is connected to one side surface of a housing 12 sealed in a rectangular box shape, and an air supply passage 16 is formed inside the housing 12.
- the electric power supplied from the motor 18 and the battery 19 provided outside the hermetic housing 12 is converted into alternating current, and the voltage and frequency are arbitrarily changed, so that the rotational speed of the motor 18 is changed.
- An inverter 20 to be controlled is disposed.
- a compressor 24 is disposed adjacent to the motor 18.
- the output shaft 18 a of the motor 18 passes through the casing 25 of the compressor 24 and is connected to the rotation shaft of the compressor wheel 26 provided inside the casing 25.
- the output shaft 18 a is rotatably supported by a bearing 22 provided in the bearing housing 21.
- the compressor wheel 26 includes a plurality of blades 26a extending radially from the rotation shaft.
- a discharge air pipe 28 is provided in the upper part of the casing 25 so as to penetrate the upper surface of the housing 12.
- the discharge air pipe 28 is connected to an air supply pipe 46 (see FIG. 2) that supplies an air supply a to the engine.
- An outside air introduction pipe 30 is connected to the side surface of the sealed housing 12 opposite to the air supply pipe 14.
- the connection port 30 a of the outside air introduction pipe 30 faces the suction port 25 a provided in the casing 25 inside the housing 12 with an interval i.
- the electric supercharger 10A mounted on the vehicle is normally provided in the engine room, the other end opening 30b of the outside air introduction pipe 30 is open to the outside of the engine room. Outside air is introduced.
- a flow rate adjustment valve 32 is provided inside the outside air introduction pipe 30, and a pressure gauge 34 for detecting the pressure of the air discharged from the discharge air pipe 28 and a flow meter 36 for detecting the flow rate of the discharge air are provided. It has been.
- a rotation speed detector 38 for detecting the rotation speed of the output shaft 18 a of the motor 18 is provided inside the bearing housing 21. Then, the detected values of the pressure gauge 34, the flow meter 36 and the rotation speed detector 38 are input to the controller 40. Based on these detected values, the controller 40 operates the flow rate adjustment valve 32 to control the opening degree of the outside air introduction pipe 30.
- the rotational speed detector 38 is used.
- the motor is driven by means not directly measured by the rotational speed detector, such as sensorless control, changes in the current / voltage waveforms of the motor and inverter By detecting the difference between the estimated current value and the actual measurement value, the rotational speed of the motor can be detected, and the detection value obtained by such another rotational speed detection means may be used.
- a plurality of cooling fins 42 arranged along the flow direction of the supply air a are provided on the outer surface of the motor 18, and the cross-sectional area of the supply air flow path 16 formed between the cooling fins 42 is the supply air flow velocity. Is increased to improve the cooling effect of the motor 18.
- a heat sink 44 for heat dissipation is provided on the outer surface of the heat generating portion of the inverter 20.
- the supply air a is sucked into the housing 12 from the supply pipe 14.
- the air supply a sucked into the housing passes through the air supply passage 16, cools the inverter 20 through the heat sink for heat dissipation 44, and further passes between the cooling fins 42 provided on the outer surface of the motor 18. Then, the motor 18 is cooled. Thereafter, the supply air a is sucked into the casing 25 from the suction port 25a, discharged to the outside of the compressor wheel 26, and discharged from the discharge air pipe 28.
- the supply air a discharged from the discharge air pipe 28 is supplied to the engine via the supply pipe 46 (see FIG. 2).
- the pressure P of the discharge air discharged from the compressor 24, the discharge air flow rate Q, and the rotation speed r of the compressor wheel 26 have the relationship shown in the compressor performance map of FIG.
- This performance map is stored in the controller 40. Therefore, the detected values of the pressure gauge 34, the flow meter 36, and the rotation speed detector 38 are input to the controller 40, and the discharge air amount and the discharge air pressure of the compressor 24 are predetermined by the influence of the pressure loss of the air supply passage 16 and the like.
- the outside air introduction pipe 30 is opened and the outside air o is introduced to increase the discharge air flow rate.
- the electric supercharger 10B of this embodiment is provided with a pressure gauge 48 in the outside air introduction pipe 30 in the vicinity of the connection port 30a, instead of providing the pressure gauge 34, the flow meter 36, and the rotation speed detector 38.
- the pressure gauge 48 detects the suction air pressure sucked into the suction port 25 a of the compressor 24 and inputs the detected value to the controller 40.
- the controller 40 operates the flow rate adjustment valve 32 in accordance with the detected value to adjust the opening degree of the outside air introduction pipe 30.
- Other configurations are the same as those of the first embodiment.
- the discharge air pressure of the compressor 24 can be obtained by measuring the suction air pressure of the compressor 24.
- the inlet pressure of the compressor 24 detected by the pressure gauge 48 is monitored by the controller 40, and the amount of air taken in from the outside air introduction pipe 30 is adjusted according to this detected value.
- a threshold value of the intake air pressure may be set, and the outside air introduction pipe 30 may be opened when the intake air pressure falls below the threshold value.
- the discharge air pressure of the compressor 24 when the discharge air pressure of the compressor 24 is reduced due to the pressure loss of the air supply passage 16 or the like, the amount of air taken in from the outside air introduction pipe 30 is increased, and the air flow rate sucked into the compressor 24 is compensated. Can do. Therefore, the capacity shortage and performance degradation of the compressor 24 can be suppressed.
- the electric supercharger 10C detects the temperature of the discharge air in the discharge air pipe 28 instead of the pressure gauge 34, the flow meter 36 and the rotation speed detector 38 provided in the first embodiment. A total of 50 is provided. The detected value of the thermometer 50 is input to the controller 40, and the controller 40 operates the flow rate adjustment valve 32 based on the detected temperature value to control the opening degree of the outside air introduction pipe 30. Other configurations are the same as those of the first embodiment.
- the temperature of the supply air “a” supplied to the cooling of the motor 18 and the inverter 20 through the supply air flow path 16 increases as the cooling efficiency increases.
- the discharge air of the compressor 24 is heated to heat the compressor 24.
- the compressor 24 is usually made of aluminum or the like, and its strength decreases when the discharge air is overheated. When the strength decreases, if a large centrifugal force is applied to the compressor wheel 26, the compressor wheel 26 may be damaged.
- the temperature of the discharge air is detected by the thermometer 50, the opening degree of the outside air introduction pipe 30 is adjusted so that this temperature does not exceed the threshold value, and outside air o is introduced from the outside air introduction pipe 30 to discharge the air. The temperature of the air is not exceeded.
- the electric supercharging device 10D of the present embodiment does not include sensors or a controller 40. Instead, a pressure adjustment valve 52 is provided in the outside air introduction pipe 30.
- the pressure regulating valve 52 includes a coil spring 60 between a valve seat 54 provided on the inner side surface of the outside air introduction pipe 30, a valve body 56 integral with the valve rod 58, and a support frame 62 provided at the connection port 30a. Interposed.
- the valve body 56 is disposed so as to be movable in the axial direction of the valve rod 58.
- Other configurations are the same as those of the first embodiment.
- the valve body 56 Due to the elastic force of the coil spring 60, the valve body 56 is normally in a position to close the outside air introduction tube 30. However, when the intake air pressure of the compressor 24 falls below the threshold value, the difference between the air pressure in the outside air introduction pipe 30 and the intake air pressure at the compressor inlet exceeds the elastic force of the compressor 24, and the valve body 56 moves to the compressor 24 side. The pressure regulating valve 52 is opened. As a result, since the outside air o is replenished from the outside air introduction pipe 30 to the suction port 25a of the compressor 24, it is possible to suppress the shortage of the discharge air of the compressor 24 and the performance degradation. Further, in the present embodiment, the controller and sensors are not required, and the pressure regulating valve 52 has only a mechanical configuration. Therefore, the configuration can be simplified, the cost is reduced, and the reliability is increased.
- the outside air introduction pipe 30 is provided with a pressure regulating valve 52 having the same configuration as that of the fourth embodiment.
- an air filter 64 is provided at the inlet of the outside air introduction pipe 30.
- an air supply pipe 66 branches into the outside air introduction pipe 30 on the downstream side of the air filter 64, and this branch air supply pipe 66 is connected to a partition wall on the inverter 22 side of the hermetic housing 12.
- Other configurations are the same as those of the fourth embodiment.
- the opening 30b of the outside air introduction tube 30 is directly open to the outside air, so that low temperature outside air o can be taken in. Since this low-temperature outside air o can be supplied not only to the outside air introduction pipe 30 but also to the branch supply pipe 66, the cooling effect of the compressor 24 can be enhanced. In addition, the cleanliness of the outside air o can be improved by the air filter 64, and problems due to foreign matter jumping in can be avoided.
- the apparatus can be made compact and the flexibility of layout can be expanded.
- the present invention in the electric supercharging device provided in the air supply passage of the internal combustion engine, it is possible to suppress the capacity shortage and the performance deterioration due to the shortage of intake air of the compressor due to the air supply passage pressure loss, etc.
- the compressor temperature rise caused by the intake of air that has been overheated by cooling can be suppressed, and the reliability of the compressor can be improved.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
特許文献2は、コンプレッサの吸入空気を利用して、電動過給装置のインバータや電動機を冷却する手段が開示されている。以下、特許文献2に開示された冷却手段を図9により説明する。 Since a power storage device such as a battery constituting the
Patent Document 2 discloses a means for cooling an inverter and an electric motor of an electric supercharger using intake air of a compressor. Hereinafter, the cooling means disclosed in Patent Document 2 will be described with reference to FIG.
蓄電装置等の電源と、内燃機関の給気流路に設けられたコンプレッサと、該コンプレッサを駆動する電動機と、前記電源の電力を変換して該電動機に供給するインバータとを備え、前記給気流路がコンプレッサの上流側で該電動機及びインバータの発熱部を通過するように配設され、給気により電動機及びインバータを冷却するようにした電動過給装置において、
空気取込口が外気に開口しコンプレッサの吸入口付近で給気流路に合流する外気導入管と、該外気導入管に設けられた空気流量調整機構と、を備え、
該外気導入管から外気を導入し、該空気流量調整機構で外気導入量を調整して、コンプレッサの吐出空気量を確保すると共に、コンプレッサの吐出空気温度を抑えるように構成したものである。 In order to achieve such an object, the electric supercharging device of the present invention includes:
A power source such as a power storage device; a compressor provided in an air supply passage of the internal combustion engine; an electric motor that drives the compressor; and an inverter that converts electric power of the power source and supplies the electric power to the electric motor. Is arranged so as to pass through the heat generating part of the electric motor and the inverter on the upstream side of the compressor, and the electric supercharger configured to cool the electric motor and the inverter by supplying air,
An external air introduction pipe whose air intake opening opens to the outside air and merges with the air supply flow path in the vicinity of the suction port of the compressor, and an air flow rate adjustment mechanism provided in the external air introduction pipe,
The outside air is introduced from the outside air introduction pipe, and the outside air introduction amount is adjusted by the air flow rate adjusting mechanism to secure the amount of discharge air of the compressor and to suppress the discharge air temperature of the compressor.
また、外気導入管から低温の外気を直接コンプレッサに導入することにより、コンプレッサの吸入空気及び吐出空気の温度上昇を抑制し、コンプレッサの強度低下を防止できる。 In the device of the present invention, in addition to the air supply flow path, an outside air introduction pipe is provided in which the air intake port opens to the outside air and introduces the outside air into the compressor. Then, when the amount of air discharged from the compressor is insufficient due to the influence of pressure loss in the air supply flow path, outside air is introduced from the outside air introduction pipe which is not easily affected by pressure loss. As a result, the amount of air discharged from the compressor can be increased, and the compressor capacity shortage and performance deterioration can be prevented.
Further, by introducing low temperature outside air directly from the outside air introduction pipe into the compressor, it is possible to suppress the rise in the temperature of the intake air and the discharge air of the compressor and to prevent the strength of the compressor from being lowered.
この構成では、コンプレッサの吸入空気圧をモニタし、該吸入空気圧に応じて外気導入量を調整する。これによって、コンプレッサ吐出管へのセンサの設置が不要になり、かつ外気導入管の空気流量調整機構との組み合せで圧力計の組み込みが可能となるため、圧力計48の取り付けが容易になると共に、センサが1個で済むため、低コストとなる。 In the apparatus of the present invention, a pressure gauge for detecting the intake air pressure of the compressor, a controller for inputting a detected value of the pressure gauge, and operating the air flow rate adjusting mechanism based on the detected value to control the outside air introduction amount; It is recommended to have
In this configuration, the intake air pressure of the compressor is monitored, and the outside air introduction amount is adjusted according to the intake air pressure. This eliminates the need for installing a sensor in the compressor discharge pipe, and allows the pressure gauge to be incorporated in combination with the air flow rate adjusting mechanism of the outside air introduction pipe, so that the
また、給気流路及び外気導入管の外気取込口及びエアフィルタを兼用することで、外気取込口及びエアフィルタの設置スペースを低減でき、装置のコンパクト化を可能すると共に、レイアウトの自由度を広げることができる。 In the apparatus of the present invention, the outside air introduction pipe and the supply air flow path are connected upstream of the air flow rate adjusting mechanism of the outside air introduction pipe, and an air filter is interposed in the upstream outside air introduction path of this connection portion. . By providing such an air filter, it is possible to improve the quietness of the supply air, and to avoid problems with the apparatus due to the entry of foreign matter.
Also, by combining the air supply passage and the outside air intake port of the outside air introduction pipe and the air filter, the installation space for the outside air intake port and the air filter can be reduced, the device can be made compact, and the degree of freedom in layout Can be spread.
本発明の電動過給装置の第1実施形態を図1~図3に基づいて説明する。図1及び図2は、自動車等に搭載されたエンジン(図示省略)の給気流路に設けられた電動過給装置10Aを示す。図1及び図2において、四角形状の箱形に密閉されたハウジング12の一側面に給気管14が接続され、ハウジング12の内部に給気流路16が形成されている。給気流路16には、モータ18と、密閉ハウジング12の外部に設けられたバッテリ19から供給される電力を交流に変換し、電圧及び周波数を任意に変更することで、モータ18の回転速度を制御するインバータ20とが配設されている。 (Embodiment 1)
A first embodiment of an electric supercharger according to the present invention will be described with reference to FIGS. 1 and 2 show an
従って、圧力計34、流量計36及び回転数検出計38の検出値をコントローラ40に入力し、給気流路16の圧力損失等の影響により、コンプレッサ24の吐出空気量及び吐出空気圧力が、所定の回転数に対して該性能マップに示す正規の値に満たない場合は、外気導入管30を開き、外気oを導入することで、吐出空気流量を増加させるようにする。 The pressure P of the discharge air discharged from the
Therefore, the detected values of the
次に、本発明装置の第2実施形態を図4により説明する。本実施形態の電動過給装置10Bは、圧力計34、流量計36及び回転数検出計38を設ける代わりに、接続口30aの近傍の外気導入管30に圧力計48を設けている。この圧力計48でコンプレッサ24の吸入口25aに吸引される吸入空気圧を検出し、この検出値をコントローラ40に入力している。そして、該検出値に応じてコントローラ40で流量調整弁32を操作し、外気導入管30の開度を調整するようにしている。その他の構成は、前記第1実施形態と同一である。 (Embodiment 2)
Next, a second embodiment of the device of the present invention will be described with reference to FIG. The
次に、本発明装置の第3実施形態を図5により説明する。本実施形態の電動過給装置10Cは、吐出空気管28に、第1実施形態で設けられた圧力計34、流量計36及び回転数検出計38の代わりに、吐出空気の温度を検出する温度計50が設けられている。この温度計50の検出値がコントローラ40に入力され、コントローラ40では、この温度検出値に基づいて流量調整弁32を操作し、外気導入管30の開度を制御する。その他の構成は、前記第1実施形態と同一である。 (Embodiment 3)
Next, a third embodiment of the device of the present invention will be described with reference to FIG. The
なお、本実施形態は、第1実施形態又は第2実施形態と組み合わせて実施されれば、コンプレッサ24の容量不足、性能低下と、コンプレッサ24の過熱による強度低下や損傷を同時に防止できる利点がある。 Therefore, it is possible to suppress an excessive temperature rise of the discharge air and prevent a decrease in strength due to overheating of the
In addition, if this embodiment is implemented in combination with 1st Embodiment or 2nd Embodiment, there exists an advantage which can prevent the capacity | capacitance shortage of a
次に、本発明装置の第4実施形態を図6により説明する。本実施形態の電動過給装置10Dは、第1~第3実施形態のように、センサ類やコントローラ40を設けない。代わりに、外気導入管30に圧力調整弁52を設けている。圧力調整弁52は、外気導入管30の内側面に設けられた弁座54と、弁棒58と一体の弁体56と、接続口30aに設けられた支持枠62との間にコイルバネ60が介装されて構成されている。弁体56は弁棒58の軸方向に移動自在に配置されている。その他の構成は、第1実施形態と同一である。 (Embodiment 4)
Next, a fourth embodiment of the device of the present invention will be described with reference to FIG. As in the first to third embodiments, the
これによって、外気導入管30から外気oがコンプレッサ24の吸入口25aに補充されるので、コンプレッサ24の吐出空気の容量不足及び性能低下を抑制できる。また、本実施形態では、コントローラ及びセンサ類が不要になり、圧力調整弁52は機械的構成のみとなるので、構成を簡素化でき、低コストになると共に、信頼性が高くなる。 Due to the elastic force of the
As a result, since the outside air o is replenished from the outside
次に、本発明装置の第5実施形態を図7により説明する。本実施形態の電動過給装置10Eでは、外気導入管30に第4実施形態と同一構成の圧力調整弁52を備えている。これに加えて、外気導入管30の入口部に、エアフィルタ64が設けられている。さらに、エアフィルタ64の下流側の外気導入管30に、給気管66が分岐し、この分岐給気管66は、密閉ハウジング12のインバータ22側の隔壁に接続されている。その他の構成は、前記第4実施形態と同一である。 (Embodiment 5)
Next, a fifth embodiment of the device of the present invention will be described with reference to FIG. In the
Claims (7)
- 電源と、内燃機関の給気流路に設けられたコンプレッサと、該コンプレッサを駆動する電動機と、前記電源の電力を変換して該電動機に供給するインバータとを備え、前記給気流路がコンプレッサの上流側で該電動機及びインバータの発熱部を通過するように配設され、給気により電動機及びインバータを冷却するようにした電動過給装置において、
空気取込口が外気に開口し前記コンプレッサの吸入口付近で前記給気流路に合流する外気導入管と、該外気導入管に設けられた空気流量調整機構と、を備え、
該外気導入管から外気を導入し、該空気流量調整機構で外気導入量を調整して、コンプレッサの吐出空気量を確保すると共に、コンプレッサの吐出空気温度を抑えるように構成したことを特徴とする電動過給装置。 A power source, a compressor provided in an air supply passage of the internal combustion engine, an electric motor that drives the compressor, and an inverter that converts electric power of the power source and supplies the electric power to the electric motor. In the electric supercharging device which is arranged so as to pass through the heat generating part of the electric motor and the inverter on the side and which cools the electric motor and the inverter by supplying air,
An outside air introduction pipe that opens to the outside air and joins the air supply flow path in the vicinity of the suction port of the compressor, and an air flow rate adjustment mechanism provided in the outside air introduction pipe,
The outside air is introduced from the outside air introduction pipe, the outside air introduction amount is adjusted by the air flow rate adjusting mechanism, and the discharge air amount of the compressor is secured, and the discharge air temperature of the compressor is suppressed. Electric supercharger. - 前記コンプレッサ、電動機及びインバータを収容し、空気取込口を有するハウジングを備え、該ハウジングの内部に該空気取込口から吸入された給気がインバータ及び電動機の発熱部を通過してコンプレッサの吸入口に至る給気流路を形成させ、前記外気導入管をコンプレッサの吸入口付近のハウジング隔壁に接続させたことを特徴とする請求項1に記載の電動過給装置。 The compressor, the electric motor and the inverter are accommodated, and a housing having an air intake port is provided. The supply air sucked from the air intake port passes through the heat generating part of the inverter and the electric motor inside the housing. 2. The electric supercharging device according to claim 1, wherein an air supply passage leading to the mouth is formed, and the outside air introduction pipe is connected to a housing partition wall in the vicinity of the suction port of the compressor.
- 前記コンプレッサの吐出側給気流路に設けられた吐出空気流量計及び吐出空気圧力計と、該コンプレッサの回転数検出手段と、該吐出空気流量計、吐出空気圧力計及び回転数検出手段の検出値を入力し、該検出値に基づいて前記空気流量調整機構を操作して外気導入量を制御するコントローラと、を備えたことを特徴とする請求項1又は2に記載の電動過給装置。 Discharge air flow meter and discharge air pressure meter provided in the discharge side air supply flow path of the compressor, rotation speed detection means of the compressor, detection values of the discharge air flow meter, discharge air pressure gauge and rotation speed detection means The electric supercharging device according to claim 1, further comprising a controller that controls the outside air introduction amount by operating the air flow rate adjusting mechanism based on the detected value.
- 前記コンプレッサの吸入空気圧を検出する圧力計と、該圧力計の検出値を入力し、該検出値に基づいて前記空気流量調整機構を操作して外気導入量を制御するコントローラと、を備えたことを特徴とする請求項1又は2に記載の電動過給装置。 A pressure gauge that detects the intake air pressure of the compressor; and a controller that inputs a detected value of the pressure gauge and controls the amount of outside air by operating the air flow rate adjusting mechanism based on the detected value. The electric supercharger according to claim 1 or 2.
- 前記コンプレッサの吐出側給気流路に設けられた吐出空気温度計と、該吐出空気温度計の検出値を入力し、該検出値が閾値を超えないように前記空気流量調整機構を操作して外気導入量を制御するコントローラと、を備えたことを特徴とする請求項1~4のいずれかの項に記載の電動過給装置。 The discharge air thermometer provided in the discharge side air supply flow path of the compressor and the detection value of the discharge air thermometer are input, and the air flow adjustment mechanism is operated so that the detection value does not exceed the threshold value. The electric supercharging device according to any one of claims 1 to 4, further comprising a controller for controlling the introduction amount.
- 前記空気流量調整機構が、前記外気導入管の空気流路を開閉する弁体と、該弁体に対して該空気流路を閉鎖する方向に弾性力を付勢し、外気導入管の空気圧と前記給気流路の空気圧との差に応じて外気導入管の空気流量を調整するバネ部材とからなる圧力調整弁であることを特徴とする請求項1又は2に記載の電動過給装置。 The air flow rate adjusting mechanism biases an elastic force in a direction to close the air flow path with respect to the valve body that opens and closes the air flow path of the outside air introduction pipe, 3. The electric supercharging device according to claim 1, wherein the electric supercharging device is a pressure adjusting valve including a spring member that adjusts an air flow rate of an outside air introduction pipe in accordance with a difference from an air pressure of the air supply passage.
- 前記空気流量調整機構の上流側で外気導入管と給気流路とが接続され、この接続部の上流側外気導入路にエアフィルタが介設されていることを特徴とする請求項1~6のいずれかの項に記載の電動過給装置。 The outside air introduction pipe and the air supply passage are connected upstream of the air flow rate adjusting mechanism, and an air filter is interposed in the upstream outside air introduction passage of the connecting portion. The electric supercharger according to any one of the items.
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US13/384,967 US9328656B2 (en) | 2010-03-18 | 2011-02-02 | Electrically driven turbocharger device |
CN201180002545.0A CN102472163B (en) | 2010-03-18 | 2011-02-02 | Electric supercharging device |
EP11755979.9A EP2444627B1 (en) | 2010-03-18 | 2011-02-02 | Electric supercharging device |
KR1020117031101A KR101263611B1 (en) | 2010-03-18 | 2011-02-02 | electric supercharging device |
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US9328656B2 (en) | 2016-05-03 |
CN102472163A (en) | 2012-05-23 |
US20120121447A1 (en) | 2012-05-17 |
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JP2011196221A (en) | 2011-10-06 |
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